os

---

Operating system interfaces

---

• https://python.readthedocs.io/en/latest/library/os.html
  
• https://python.readthedocs.io/en/latest/library/os.path.html

---

os.path

import os
os.path.abspath('a/b/c')
#  '/Users/darrenkidney/Github/how2/how2-py/a/b/c'
os.path.basename('a/b/c')
#  'c'
os.path.dirname('a/b/c')
#  'a/b'
os.path.expanduser('~')
#  '/Users/darrenkidney'
os.path.join('a', 'b', 'c')
#  'a/b/c'
os.path.split('a/b/c')
#  ('a/b', 'c')
os.path.getsize('.') # in bytes
#  2432

predictates

import os
os.path.exists('a/b/c')
#  False
os.path.isabs('a/b/c')
#  False
os.path.isdir('a/b/c')
#  False
os.path.isfile('a/b/c')
#  False

---

misc

import os
os.getcwd()
#  '/Users/darrenkidney/Github/how2/how2-py'
os.getenv('HOME')
#  '/Users/darrenkidney'
os.getenv('BLAH', default='asdf')
#  'asdf'

os.mkdir('new_dir')
os.remove('new_file')